Boiler bottom slag waste heat recovery device

Abstract

The boiler bottom slag waste heat recovery device comprises a slag well body, a water tank, a slag barrel and a lifting mechanism, a cavity with an upward opening is formed in the slag well body, the slag barrel and the water tank are arranged in the cavity at intervals in the vertical direction, the water tank is located above the slag barrel, the slag barrel is used for containing boiler bottom slag, and the opening of the slag barrel faces the water tank; therefore, heat emitted by boiler bottom slag contained in the slag barrel can heat water in the water tank. The lifting mechanism is installed on the slag well body and connected with the water tank, the water tank is connected with the slag barrel, and the lifting mechanism is used for driving the water tank and the slag barrel to move together in the vertical direction so that the slag barrel and the water tank can be lifted out of the cavity. The slag barrel and the water tank are arranged at intervals, so that waste heat of bottom slag is used for heating water. Due to the fact that the slag barrel and the water tank are arranged in the cavity of the slag well body at intervals in the vertical direction, the space in the vertical direction can be utilized more reasonably, and the slag well is suitable for being arranged in the slag well body with the compact horizontal space.

Description

Technical Field

[0001] The present disclosure relates to the technical field of thermal power plant equipment, and more particularly, to a boiler bottom slag waste heat recovery device. Background Art

[0002] A boiler is an energy conversion device. The energy input into the boiler includes chemical energy in fuel and electrical energy. The boiler outputs steam, high-temperature water or organic heat carriers with a certain amount of heat energy. The bottom slag refers to the ash slag discharged from the bottom slag discharge port generated by the combustion of fuel in the boiler furnace.

[0003] The temperature of the bottom slag is generally about 900°C. In order to reduce the waste of the energy of the bottom slag, in related technologies, a bottom slag waste heat recovery device is usually used to recover the waste heat of the bottom slag. For example, in the patent document with the authorization publication number CN216307830U, a boiler bottom slag waste heat recovery and utilization device is disclosed. The device is provided with an internal and external heating chamber inside the casing, and a heat exchange cylinder is arranged between the internal and external heating chambers. By adding bottom slag into the internal and external heating chambers, the bottom slag exchanges heat with the water in the heat exchange cylinder. However, since the above-mentioned boiler bottom slag waste heat recovery and utilization device needs to arrange the internal and external heating chambers horizontally at the same time, it occupies a large space in the horizontal direction. In the actual use process, in order to install the above-mentioned boiler bottom slag waste heat recovery and utilization device, the volume of the heat exchange cylinder can only be reduced, resulting in a small amount of bottom slag that the heat exchange cylinder can accommodate. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a boiler bottom slag waste heat recovery device to solve the above technical problems.

[0005] To achieve the above purpose, the present disclosure provides a boiler bottom slag waste heat recovery device, including a slag well main body, a water tank, a slag bucket and a lifting mechanism. A cavity with an upward opening is formed in the slag well main body. The slag bucket and the water tank are arranged in the cavity at intervals in the vertical direction, and the water tank is located above the slag bucket. The slag bucket is used to hold the boiler bottom slag, and the opening of the slag bucket faces the water tank, so that the heat emitted by the boiler bottom slag held in the slag bucket can heat the water in the water tank.

[0006] The lifting mechanism is installed on the slag well main body and is connected to the water tank. The water tank is connected to the slag bucket. The lifting mechanism is used to drive the water tank and the slag bucket to move together in the vertical direction, so that the slag bucket and the water tank can be lifted out of the cavity.

[0007] Optionally, the cavity includes a first chamber and a second chamber that communicate with each other. The first chamber is located above the second chamber. The first chamber is used to accommodate the water tank, and the second chamber is used to accommodate the slag bucket.

[0008] The diameter of the first chamber is greater than that of the second chamber, and the outer diameter of the water tank is greater than that of the second chamber.

[0009] Optionally, the diameter of the water tank is less than that of the first chamber, and a stepped surface is formed at the connection between the first chamber and the second chamber, and the stepped surface is used to abut against the bottom surface of the water tank.

[0010] Optionally, the lifting mechanism includes a bracket, a driving assembly and a connecting plate. The lower end of the bracket is installed on the main body of the slag well and extends along the up and down direction. The connecting plate is movably installed on the bracket along the up and down direction. The driving assembly is installed on the bracket and connected to the connecting plate. The upper end of the water tank is connected to the connecting plate. The connecting plate is provided with a liquid inlet and a water pump communicated with the inside of the water tank. The driving assembly is used to drive the connecting plate to move along the up and down direction;

[0011] The boiler bottom slag waste heat recovery device further includes a plurality of connecting rods. The plurality of connecting rods are arranged at intervals along the circumference of the cavity, and the water tank and the slag bucket are connected by the plurality of connecting rods.

[0012] Optionally, the driving assembly includes a first motor, a first lead screw and a first nut. The first motor is installed at the upper end of the bracket. The first lead screw is installed in the bracket. One end of the first lead screw is in transmission connection with the output end of the first motor. The first nut is sleeved on the first lead screw and forms a lead screw-nut pair with the first lead screw. The first nut is connected to the connecting plate.

[0013] Optionally, a slag discharge port is formed at the bottom of the slag bucket, and a slag blocking member is arranged inside the slag bucket. The slag blocking member can move along the axial direction of the slag bucket to expose or cover the slag discharge port;

[0014] The boiler bottom slag waste heat recovery device further includes a slag discharge mechanism and a horizontal moving mechanism. The horizontal moving mechanism includes a slide rail installed on the main body of the slag well. The slide rail extends along the horizontal direction. One end of the slide rail is close to the opening of the cavity. The slag discharge mechanism is arranged close to the other end of the slide rail. The lower end of the bracket is slidably matched with the slide rail. The slag discharge mechanism is configured to be able to push the slag blocking member upward so that the slag blocking member exposes the slag discharge port.

[0015] Optionally, the slag discharge mechanism includes a mounting frame, a hydraulic cylinder and a push rod. The mounting frame is installed on the main body of the slag well. The hydraulic cylinder is installed on the mounting frame. The push rod is connected to the hydraulic cylinder. The hydraulic cylinder is used to drive the push rod to move along the up and down direction.

[0016] Optionally, the horizontal movement mechanism further includes a second motor, a second lead screw, and a second nut. The second motor is installed on the slide rail. The second lead screw is disposed within the slide rail and is in transmission connection with the output shaft of the second motor. The second nut is sleeved on the second lead screw and forms a lead screw-nut pair with the second lead screw. The lower end of the bracket is connected to the second nut.

[0017] Optionally, a fixing frame is provided inside the slag bucket. The fixing frame includes a fixing block and a fixing rod. One end of the fixing rod is connected to the fixing block, and the other end of the fixing rod is connected to the inner wall of the slag bucket. A through hole is formed in the fixing block;

[0018] A moving rod is installed on the slag blocking member. The moving rod is movably inserted through the through hole along the axial direction of the slag bucket.

[0019] Optionally, a guiding portion is provided inside the slag bucket. The guiding portion is disposed near the slag discharge port. The guiding portion has a guiding cavity communicating with the slag discharge port;

[0020] Along the direction from top to bottom, the diameter of the guiding cavity gradually decreases;

[0021] Along the direction from top to bottom, at least part of the outer diameter of the slag blocking member gradually increases.

[0022] Through the above technical solution, both the slag bucket and the water tank are located in the cavity. The boiler bottom slag in the slag bucket can transfer heat to the water in the water tank by means of thermal radiation, so as to utilize the waste heat of the bottom slag to heat the water. The heated water can return to the water-vapor cycle of the boiler, reducing the heat required for the boiler to heat the water into steam. Moreover, since the slag bucket and the water tank are arranged at intervals in the vertical direction in the cavity of the slag well body, the boiler bottom slag waste heat recovery device provided by the present disclosure can make more reasonable use of the space in the vertical direction, and minimize the volume of the boiler bottom slag waste heat recovery device in the horizontal direction as much as possible, facilitating the arrangement of the slag bucket and the water tank in the cavity of the slag well body. The boiler bottom slag waste heat recovery device provided by the present disclosure can be arranged in the slag well body with a relatively compact horizontal space.

[0023] In addition, since the slag bucket and the water tank are arranged at intervals in the vertical direction, an interval space is formed between the slag bucket and the water tank. When adding bottom slag into the slag bucket, the difficulty of adding boiler bottom slag will not be increased due to the interference of the water tank, further reducing the use difficulty of the boiler bottom slag recovery device.

[0024] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0025] The accompanying drawings are used to provide a further understanding of the present disclosure and form a part of the specification. Together with the following detailed description, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the accompanying drawings:

[0026] Figure 1 is a perspective view of a boiler bottom slag waste heat recovery device provided by an embodiment of the present disclosure. Among them, the slag bucket is cut to facilitate showing the internal structure of the slag bucket;

[0027] Figure 2 is Figure 1 an enlarged view of part A in

[0028] Figure 3 is a perspective view of a boiler bottom slag waste heat recovery device provided by an embodiment of the present disclosure (with Figure 1 a different perspective);

[0029] Figure 4 is a side view of a boiler bottom slag waste heat recovery device provided by an embodiment of the present disclosure when installed in the cavity of the slag well main body;

[0030] Figure 5 is a perspective view of a boiler bottom slag waste heat recovery device provided by an embodiment of the present disclosure (with Figure 1 , Figure 3 a different perspective).

[0031] Explanation of reference numerals

[0032] 100 - Boiler bottom slag waste heat recovery device; 1 - Slag well main body; 11 - Cavity; 111 - First chamber; 112 - Second chamber; 113 - Step surface; 2 - Water tank; 3 - Slag bucket; 31 - Slag discharge port; 32 - Slag retaining member; 321 - Moving rod; 33 - Fixed frame; 331 - Fixed block; 332 - Fixed rod; 333 - Through hole; 34 - Guide portion; 341 - Guide cavity; 4 - Lifting mechanism; 41 - Bracket; 42 - Driving assembly; 421 - First motor; 43 - Connecting plate; 431 - Liquid inlet; 432 - Water pump; 5 - Connecting rod; 6 - Slag discharge mechanism; 61 - Mounting frame; 62 - Hydraulic cylinder; 63 - Push rod; 7 - Horizontal moving mechanism; 71 - Slide rail; 72 - Second motor. Detailed description of the specific embodiment

[0033] The following provides a detailed description of the specific embodiments of the present disclosure in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure.

[0034] In the present disclosure, unless otherwise stated, the orientation terms such as "upper" and "lower" are usually defined based on the normal working state of the boiler bottom slag waste heat recovery device. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, as well as a specific orientation structure and operation. Therefore, it should not be construed as a limitation to the present disclosure. "Inner" and "outer" refer to the inside and outside of the contour of the corresponding component. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0035] In the description of the present disclosure, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "linked", and "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0036] As Figures 1 to 5 shown, the present disclosure provides a boiler bottom slag waste heat recovery device 100, which includes a slag well main body 1, a water tank 2, a slag bucket 3, and a lifting mechanism 4. A cavity 11 with an upward opening is formed in the slag well main body 1. The slag bucket 3 and the water tank 2 are arranged at intervals in the cavity 11 in the up and down direction, and the water tank 2 is located above the slag bucket 3. The slag bucket 3 is used to hold the boiler bottom slag, and the opening of the slag bucket 3 faces the water tank 2, so that the heat emitted by the boiler bottom slag held in the slag bucket 3 can heat the water in the water tank 2. The lifting mechanism 4 is installed on the slag well main body 1 and is connected to the water tank 2. The water tank 2 is connected to the slag bucket 3. The lifting mechanism 4 is used to drive the water tank 2 and the slag bucket 3 to move together in the up and down direction, so that the slag bucket 3 and the water tank 2 can be lifted out of the cavity 11.

[0037] Before heating the water in the water tank 2 with the boiler bottom slag, the lifting mechanism 4 can be used to drive the connected water tank 2 and slag bucket 3 to move upward to move the water tank 2 and the slag bucket 3 out of the cavity 11, pour the boiler bottom slag into the slag bucket 3 through the opening of the slag bucket 3, and then drive the water tank 2 and the slag bucket 3 to descend through the lifting mechanism 4, so that both the water tank 2 and the slag bucket 3 are in the cavity 11 of the slag well main body 1.

[0038] Through the above technical solution, the slag bucket 3 and the water tank 2 are both located in the cavity 11. The boiler bottom slag in the slag bucket 3 can transfer heat to the water in the water tank 2 by means of thermal radiation, thereby using the waste heat of the bottom slag to heat the water. The heated water can return to the water-vapor cycle of the boiler, reducing the heat required for the boiler to heat the water into steam. Moreover, since the slag bucket 3 and the water tank 2 are arranged at intervals in the vertical direction in the cavity 11 of the slag well body 1, the boiler bottom slag waste heat recovery device 100 provided in the present disclosure can make more reasonable use of the space in the vertical direction, minimizing the volume of the boiler bottom slag waste heat recovery device 100 in the horizontal direction, facilitating the arrangement of the slag bucket 3 and the water tank 2 in the cavity 11 of the slag well body 1. The boiler bottom slag waste heat recovery device 100 provided in the present disclosure can be arranged in the slag well body 1 with a relatively compact horizontal space.

[0039] In addition, since the slag bucket 3 and the water tank 2 are arranged at intervals in the vertical direction, an interval space is formed between the slag bucket 3 and the water tank 2. When adding bottom slag into the slag bucket 3, the difficulty of adding boiler bottom slag will not increase due to the interference of the water tank 2, further reducing the use difficulty of the boiler bottom slag recovery device.

[0040] It can be understood that the water tank 2 can be made of a material with good heat conduction effect. For example, the water tank 2 can be made of materials with good heat conduction such as copper, iron, and aluminum.

[0041] To make the heat dissipated by the boiler bottom slag more concentrated, optionally, as Figure 1 shown, the cavity 11 includes a first chamber 111 and a second chamber 112 that are interconnected. The first chamber 111 is located above the second chamber 112. The first chamber 111 is used to accommodate the water tank 2, and the second chamber 112 is used to accommodate the slag bucket 3. The diameter of the first chamber 111 is larger than the diameter of the second chamber 112, and the outer diameter of the water tank 2 is larger than the diameter of the second chamber 112. The water tank 2 and the slag bucket 3 are respectively arranged in the first chamber 111 and the second chamber 112, and the outer diameter of the water tank 2 is larger than the diameter of the second chamber 112. In this way, the water tank 2 can completely cover the opening of the second chamber 112, avoiding the existence of a gap between the water tank 2 and the inner wall of the second chamber 112, thereby reducing the heat loss during the thermal radiation of the boiler bottom slag.

[0042] Optionally, as Figure 1 and Figure 5As shown, the diameter of the water tank 2 is smaller than that of the first chamber 111. A stepped surface 113 is formed at the connection between the first chamber 111 and the second chamber 112, and the stepped surface 113 is used to abut against the bottom surface of the water tank 2. To facilitate the installation of the water tank 2 in the first chamber 111, the diameter of the first chamber 111 is set to be larger than that of the water tank 2. At the same time, since the diameter of the first chamber 111 is larger than that of the second chamber 112, a stepped surface 113 can be formed at the connection between the first chamber 111 and the second chamber 112, and the stepped surface 113 is used to abut against the bottom surface of the water tank 2, thereby providing vertical support for the water tank 2, reducing the gravity borne by the lifting mechanism 4 when the water tank 2 and the slag bucket 3 are not moving, and extending the service life of the boiler bottom slag waste heat recovery device 100.

[0043] To facilitate the addition of boiler bottom slag into the slag bucket 3, optionally, as Figure 1 and Figure 3 shown, the lifting mechanism 4 includes a bracket 41, a driving assembly 42, and a connecting plate 43. The lower end of the bracket 41 is installed on the slag well main body 1 and extends in the vertical direction. The connecting plate 43 is movably installed on the bracket 41 in the vertical direction. The driving assembly 42 is installed on the bracket 41 and connected to the connecting plate 43. The upper end of the water tank 2 is connected to the connecting plate 43, and the driving assembly 42 is used to drive the connecting plate 43 to move in the vertical direction. The boiler bottom slag waste heat recovery device 100 further includes a plurality of connecting rods 5. The plurality of connecting rods 5 are arranged at intervals in the circumferential direction of the cavity 11. The water tank 2 and the slag bucket 3 are connected by the plurality of connecting rods 5.

[0044] The connecting plate 43 can move in the vertical direction along the bracket 41 under the drive of the driving assembly 42. The upper end of the water tank 2 is connected to the connecting plate 43. Therefore, when the connecting plate 43 moves in the vertical direction along the bracket 41, the water tank 2 and the slag bucket 3 connected to the water tank 2 can be driven to move together, achieving the effect of putting the water tank 2 and the slag bucket 3 into or out of the cavity 11. Moreover, a plurality of connecting rods 5 arranged at intervals in the circumferential direction of the cavity 11 are provided between the water tank 2 and the slag bucket 3. While connecting the water tank 2 and the slag bucket 3, it can also ensure that when adding boiler bottom slag into the slag bucket 3, the difficulty of adding boiler bottom slag will not be increased due to the obstruction of the connecting rods 5, further improving the use convenience of the boiler bottom slag waste heat recovery device 100.

[0045] Optionally, as Figure 1 shown, a liquid inlet 431 and a water pump 432 communicating with the inside of the water tank 2 can also be provided on the connecting plate 43. After the water temperature in the water tank 2 reaches the set temperature, the water in the water tank 2 can be pumped out to the heat preservation water storage tank through the water pump 432 to supplement circulating water to the boiler system. At the same time, low-temperature water to be heated is supplemented into the water tank 2 through the liquid inlet 431.

[0046] The present disclosure does not limit the specific structure of the driving component 42. In an implementation manner provided by the present disclosure, as Figure 1 , Figure 3 and Figure 4 shown, the driving component 42 includes a first motor 421, a first lead screw, and a first nut. The first motor 421 is installed at the upper end of the bracket 41. The first lead screw is installed in the bracket 41. One end of the first lead screw is in transmission connection with the output end of the first motor 421. The first nut is sleeved on the first lead screw and forms a lead screw-nut pair with the first lead screw. The first nut is connected to the connecting plate 43. Since the first lead screw can rotate under the drive of the first motor 421, and the first nut is sleeved on the first lead screw, the first nut can move along the axial direction of the first lead screw under the drive of the first motor 421, further driving the connecting plate 43 to move along the axial direction of the first lead screw. The axial direction of the first lead screw is the same as the extending direction of the bracket 41, so that the connecting plate 43 can move along the extending direction of the bracket 41, driving the water tank 2 connected to the connecting plate 43 to move in the up and down direction.

[0047] In another implementation manner provided by the present disclosure, the driving component 42 may include a third motor and a pull rope. The first end of the pull rope is fixed on the connecting plate 43, and the second end of the pull rope is fixed on the output shaft of the third motor. The second end of the pull rope can be wound around the output shaft of the third motor so that the first end of the pull rope can move up and down along with the rotation of the output shaft, thereby lifting or lowering the connecting plate 43.

[0048] For the convenience of slag discharging of the slag bucket 3, optionally, as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, a slag discharging port 31 is formed at the bottom of the slag bucket 3, and a slag blocking member 32 is arranged inside the slag bucket 3. The slag blocking member 32 can move along the axial direction of the slag bucket 3 to expose or cover the slag discharging port 31.

[0049] The boiler bottom slag waste heat recovery device 100 further includes a slag discharging mechanism 6 and a horizontal moving mechanism 7. The horizontal moving mechanism 7 includes a slide rail 71 installed on the slag well main body 1. The slide rail 71 extends in the horizontal direction. One end of the slide rail 71 is close to the opening of the cavity 11. The slag discharging mechanism 6 is arranged close to the other end of the slide rail 71. The lower end of the bracket 41 is slidably matched with the slide rail 71. The slag discharging mechanism 6 is configured to be able to push the slag blocking member 32 upward so that the slag blocking member 32 exposes the slag discharging port 31.

[0050] After the water tank 2 and the slag bucket 3 are lifted out of the cavity 11 by the lifting mechanism 4, the slide rail 71 of the horizontal movement mechanism 7 can be used to move the support 41, thereby driving the connecting plate 43 arranged on the support 41 and the water tank 2 and the slag bucket 3 connected thereto to move along the extending direction of the slide rail 71, so that the slag discharge port 31 of the slag bucket 3 is placed above the slag discharge mechanism 6, enabling the slag discharge mechanism 6 to push the slag blocking member 32 upward to expose the slag discharge port 31, so that the boiler bottom slag can be discharged from the slag bucket 3 through the slag discharge port 31 under the action of gravity.

[0051] Optionally, as Figure 1 , Figure 3 and Figure 4 shown, the slag discharge mechanism 6 includes a mounting frame 61, a hydraulic cylinder 62 and a push rod 63. The mounting frame 61 is mounted on the slag well main body 1, the hydraulic cylinder 62 is mounted on the mounting frame 61, the push rod 63 is connected to the hydraulic cylinder 62, and the hydraulic cylinder 62 is used to drive the push rod 63 to move in the up and down direction. When the slag bucket 3 is moved above the slag discharge mechanism 6, the hydraulic cylinder 62 can be used to drive the push rod 63 to move upward to push the slag blocking member 32 to expose the slag discharge port 31. After the slag discharge is completed, the hydraulic cylinder 62 drives the push rod 63 to move downward, and the slag blocking member 32 moves downward under the action of gravity to cover the slag discharge port 31 again.

[0052] In another implementation manner provided by the present disclosure, the slag discharge mechanism 6 may further include a mounting frame 61, a cylinder and a push rod 63. The mounting frame 61 is mounted on the slag well main body 1, the cylinder is mounted on the mounting frame 61, the push rod 63 is connected to the cylinder, and the cylinder is used to drive the push rod 63 to move in the up and down direction.

[0053] In order to move the slag bucket 3 in the horizontal direction, optionally, as Figure 3 shown, the horizontal movement mechanism 7 further includes a second motor 72, a second lead screw and a second nut. The second motor 72 is mounted on the slide rail 71, the second lead screw is arranged in the slide rail 71 and is in transmission connection with the output shaft of the second motor 72, the second nut is sleeved on the second lead screw and forms a lead screw-nut pair with the second lead screw, and the lower end of the support 41 is connected to the second nut. The lower end of the support 41 is slidably arranged in the slide rail 71. After the water tank 2 and the slag bucket 3 are lifted out of the cavity 11 by the lifting mechanism 4, the second motor 72 drives the second lead screw to rotate to drive the second nut sleeved on the second lead screw to move, thereby further driving the lower end of the support 41 to slide horizontally in the slide rail 71. The lifting mechanism 4 moves in the direction away from or close to the opening of the slag well main body 1 under the drive of the horizontal movement mechanism 7, so that after the cooled bottom slag in the slag bucket 3 is discharged through the slag discharge mechanism 6, new bottom slag is added and then put into the cavity 11 of the slag well main body 1.

[0054] In order to limit the movement range of the slag blocking member 32, optionally, as Figure 2As shown, a fixed frame 33 is provided inside the slag bucket 3. The fixed frame 33 includes a fixed block 331 and a fixed rod 332. One end of the fixed rod 332 is connected to the fixed block 331, and the other end of the fixed rod 332 is connected to the inner wall of the slag bucket 3. A through hole 333 is formed on the fixed block 331. A moving rod 321 is installed on the slag blocking member 32. The moving rod 321 is movably inserted through the through hole 333 along the axial direction of the slag bucket 3. Since the slag blocking member 32 can move in the up and down direction under the push of the slag discharging mechanism 6, and the fixed block 331 is connected to the inner wall of the slag bucket 3 through the fixed rod 332, the moving rod 321 connected to the slag blocking member 32 can limit the freedom degree of the slag blocking member 32 in the horizontal direction through the fixed block 331. When the slag blocking member 32 moves in the up and down direction, it will not tip to one side, ensuring the normal operation of the slag blocking member 32.

[0055] Optionally, as Figure 2 shown, the inside of the slag bucket 3 has a guiding portion 34. The guiding portion 34 is arranged close to the slag discharging port 31. The guiding portion 34 has a guiding cavity 341 communicating with the slag discharging port 31. Along the direction from top to bottom, the diameter of the guiding cavity 341 gradually decreases; along the direction from top to bottom, the outer diameter of at least part of the slag blocking member 32 gradually increases. When the slag blocking member 32 moves upward to expose the slag discharging port 31, since the diameter of the guiding cavity 341 gradually decreases along the direction from top to bottom, an inclined surface is formed around the slag discharging port 31 to guide the bottom slag to flow towards the slag discharging port 31. At the same time, it prevents the bottom slag from remaining at the bottom of the slag bucket 3. And in the direction from top to bottom, the outer diameter of at least part of the slag blocking member 32 gradually increases to form a slag blocking member 32 in the shape of a frustum. Setting the slag blocking member 32 at the slag discharging port 31 in the shape of a frustum can use the inclined surface of the frustum to guide the bottom slag to flow to the gap between the slag blocking member 32 and the slag discharging port 31, thereby further emptying the bottom slag at the bottom of the slag bucket 3.

[0056] Optionally, the boiler bottom slag waste heat recovery device 100 may further include a slag bucket temperature sensor and a water tank temperature sensor. The slag bucket temperature sensor and the water tank temperature sensor are respectively arranged in the slag bucket 3 and the water tank 2 to monitor the temperature of the boiler bottom slag in the slag bucket 3 and the water temperature in the water tank 2. When the temperature of the boiler bottom slag drops to the ambient temperature, the lifting mechanism 4 and the slag discharging mechanism 6 can be coordinated to replace the boiler bottom slag in the slag bucket 3. And when the water temperature reaches the set temperature, the water in the water tank 2 can be discharged through the water pump 432 and low-temperature water to be heated can be added at the same time.

[0057] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0058] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0059] In addition, any combination can be made among various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A boiler bottom ash waste heat recovery device, characterized in that: The utility model comprises a slag pit body, a water tank, a slag bucket and a lifting mechanism, wherein a cavity with an opening facing upward is formed in the slag pit body, the slag bucket and the water tank are arranged in the cavity with intervals in the up-down direction, and the water tank is located above the slag bucket, the slag bucket is used to hold boiler bottom slag, and the opening of the slag bucket faces the water tank, so that the heat emitted by the boiler bottom slag held in the slag bucket can heat the water in the water tank; The lifting mechanism is installed on the slag pit body and connected to the water tank, the water tank is connected to the slag bucket, and the lifting mechanism is used to drive the water tank and the slag bucket to move together along the up and down directions so that the slag bucket and the water tank can be lifted out of the cavity.

2. The boiler bottom ash waste heat recovery device according to claim 1, characterized in that: The cavity comprises a first chamber and a second chamber which are interconnected, the first chamber is located above the second chamber, the first chamber is used to accommodate the water tank, and the second chamber is used to accommodate the slag bucket; The diameter of the first chamber is greater than the diameter of the second chamber, and the outer diameter of the water tank is greater than the diameter of the second chamber.

3. The boiler bottom ash waste heat recovery device according to claim 2, characterized in that: The diameter of the water tank is smaller than the diameter of the first chamber. A step surface is formed at the connection between the first chamber and the second chamber, and the step surface is used to abut against the bottom surface of the water tank.

4. The boiler bottom ash waste heat recovery device according to claim 1, characterized in that: The lifting mechanism comprises a bracket, a driving assembly and a connecting plate, the lower end of the bracket is mounted on the slag pit body and extends in the up-down direction, the connecting plate is movably mounted on the bracket in the up-down direction, the driving assembly is mounted on the bracket and connected to the connecting plate, the upper end of the water tank is connected to the connecting plate, a liquid inlet and a water pump communicating with the inside of the water tank are provided on the connecting plate, and the driving assembly is used to drive the connecting plate to move in the up-down direction; The boiler bottom ash waste heat recovery device also includes a plurality of connecting rods, which are arranged at intervals along the circumference of the cavity, and the water tank and the slag bucket are connected by the plurality of connecting rods.

5. The boiler bottom ash waste heat recovery device according to claim 4, characterized in that: The driving assembly includes a first motor, a first lead screw and a first nut. The first motor is installed at the upper end of the bracket, the first lead screw is installed in the bracket, one end of the first lead screw is transmission-connected to the output end of the first motor, the first nut is sleeved on the first lead screw and forms a lead screw-nut pair with the first lead screw, and the first nut is connected to the connecting plate.

6. The boiler bottom ash waste heat recovery device according to claim 4, characterized in that: A slag discharge port is formed at the bottom of the slag bucket, and a slag blocking member is arranged inside the slag bucket, and the slag blocking member can move along the axial direction of the slag bucket to expose or cover the slag discharge port; The boiler bottom ash waste heat recovery device also includes a slag discharge mechanism and a horizontal moving mechanism. The horizontal moving mechanism includes a slide rail installed on the slag pit body, the slide rail extends in a horizontal direction, one end of the slide rail is close to the opening of the cavity, and the slag discharge mechanism is arranged close to the other end of the slide rail. The lower end of the bracket is slidably fitted with the slide rail. The slag discharge mechanism is constructed to be able to push the slag blocking member upward so that the slag blocking member is exposed from the slag discharge port.

7. The boiler bottom ash waste heat recovery device according to claim 6, characterized in that: The slag discharge mechanism includes a mounting frame, a hydraulic cylinder and a push rod, the mounting frame is mounted on the slag pit body, the hydraulic cylinder is mounted on the mounting frame, the push rod is connected to the hydraulic cylinder, and the hydraulic cylinder is used to drive the push rod to move along the up and down directions.

8. The boiler bottom ash waste heat recovery device according to claim 6, characterized in that: The horizontal moving mechanism also includes a second motor, a second lead screw and a second nut. The second motor is installed on the slide rail. The second lead screw is arranged in the slide rail and is drivingly connected to the output shaft of the second motor. The second nut is sleeved on the second lead screw and forms a lead screw nut pair with the second lead screw. The lower end of the bracket is connected to the second nut.

9. The boiler bottom ash waste heat recovery device according to claim 6, characterized in that: A fixing frame is arranged in the slag bucket, and the fixing frame comprises a fixing block and a fixing rod, one end of the fixing rod is connected to the fixing block, and the other end of the fixing rod is connected to the inner wall of the slag bucket, and a through hole is formed on the fixing block; A moving rod is installed on the slag blocking member, and the moving rod is movably arranged in the through hole along the axial direction of the slag bucket.

10. The boiler bottom ash waste heat recovery device according to claim 6, characterized in that: The slag bucket has a guide portion inside, the guide portion is arranged close to the slag discharge port, and the guide portion has a guide cavity communicated with the slag discharge port; From top to bottom, the diameter of the guide cavity gradually decreases; Along the direction from top to bottom, the outer diameter of at least part of the slag blocking member gradually increases.

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